Don't run plugin install un-necessarily.

playbooks/roles/jenkins_master/tasks/main.yml

@@ -23,13 +23,17 @@
 # Should be resolved in the next release, but until then we need to do this
 # https://issues.jenkins-ci.org/browse/JENKINS-20407
 - name: workaround for JENKINS-20407
-  command: "mkdir -p /var/run/jenkins"
-
+  file:
+    path="/var/run/jenkins"
+    state=directory
+    owner="{{ jenkins_user }}"
+    group="{{ jenkins_group }}"
+  
 - name: download Jenkins package
   get_url: url="{{ jenkins_deb_url }}" dest="/tmp/{{ jenkins_deb }}"
 
 - name: install Jenkins package
-  command: dpkg -i --force-depends "/tmp/{{ jenkins_deb }}"
+  shell: dpkg -i --force-depends "/tmp/{{ jenkins_deb }}"
 
 - name: stop Jenkins
   service: name=jenkins state=stopped
@@ -57,8 +61,11 @@
   shell: usermod -d {{jenkins_home}} {{jenkins_user}}
 
 - name: make plugins directory
-  sudo_user: jenkins
-  shell: mkdir -p {{ jenkins_home }}/plugins
+  file:
+    path="{{ jenkins_home }}/plugins"
+    state=directory
+    owner="{{ jenkins_user }}"
+    group="{{ jenkins_group }}"
 
 # We first download the plugins to a temp directory and include
 # the version in the file name.  That way, if we increment
@@ -67,15 +74,18 @@
   get_url: url=http://updates.jenkins-ci.org/download/plugins/{{ item.name }}/{{ item.version }}/{{ item.name }}.hpi
            dest=/tmp/{{ item.name }}_{{ item.version }}
   with_items: jenkins_plugins
+  register: jenkins_plugin_downloads
 
 - name: install Jenkins plugins
-  command: cp /tmp/{{ item.name }}_{{ item.version }} {{ jenkins_home }}/plugins/{{ item.name }}.hpi
-  with_items: jenkins_plugins
+  command: cp {{ item.dest}} {{ jenkins_home }}/plugins/{{ item.item.name }}.hpi
+  with_items: jenkins_plugin_downloads.results
+  when: item.changed
 
 - name: set Jenkins plugin permissions
-  file: path={{ jenkins_home }}/plugins/{{ item.name }}.hpi
+  file: path={{ jenkins_home }}/plugins/{{ item.item.name }}.hpi
         owner={{ jenkins_user }} group={{ jenkins_group }} mode=700
-  with_items: jenkins_plugins
+  with_items: jenkins_plugin_downloads.results
+  when: item.changed
   notify:
     - restart Jenkins
 
@@ -88,23 +98,26 @@
     repo={{ item.repo_url }} dest=/tmp/{{ item.repo_name }} version={{ item.version }}
     accept_hostkey=yes
   with_items: jenkins_custom_plugins
+  register: jenkins_custom_plugins_checkout
 
 - name: compile custom plugins
-  command: mvn -Dmaven.test.skip=true install chdir=/tmp/{{ item.repo_name }}
-  with_items: jenkins_custom_plugins
+  command: mvn -Dmaven.test.skip=true install chdir=/tmp/{{ item.item.repo_name }}
+  with_items: jenkins_custom_plugins_checkout.results
+  when: item.changed 
 
 - name: install custom plugins
-  command: mv /tmp/{{ item.repo_name }}/target/{{ item.package }}
-           {{ jenkins_home }}/plugins/{{ item.package }}
-  with_items: jenkins_custom_plugins
+  command: mv /tmp/{{ item.item.repo_name }}/target/{{ item.item.package }}
+           {{ jenkins_home }}/plugins/{{ item.item.package }}
+  with_items: jenkins_custom_plugins_checkout.results
+  when: item.changed 
   notify:
     - restart Jenkins
 
 - name: set custom plugin permissions
-  file: path={{ jenkins_home }}/plugins/{{ item.package }}
+  file: path={{ jenkins_home }}/plugins/{{ item.item.package }}
         owner={{ jenkins_user }} group={{ jenkins_group }} mode=700
-  with_items: jenkins_custom_plugins
-
+  with_items: jenkins_custom_plugins_checkout.results
+  when: item.changed 
 
 # Plugins that are bundled with Jenkins are "pinned".
 # Jenkins will overwrite updated plugins with its built-in version